表达式可以化为:asin(2A/5+b)的形式消猛,周期为:2PI/(2/5)=5PI 然后两条拿扮桥对称缺岩轴的距离应该是半个周期为:5PI/2
如果记得没错的话a*sin(x)+b*cos(x)=√(a^2+b^2)*sin(x+arctan(b/a))则cos(2A/5)+sin(2A/5)=(√2)*sin(2A/5+π/4)相邻两散链颂条对冲郑称轴:半个周期 T/2=2π/ω/唤首2=2π/(2/5)/2=5π/2